JP5946892B2 - Insulation cover and adapter for overhead distribution lines - Google Patents

Description

  The present invention relates to an insulation cover for an aerial distribution line and an adapter with improved workability when mounted on the aerial distribution line.

When working on a high-voltage or extra-high-voltage circuit, it is legally required to use a short-circuit grounding device to prevent erroneous energization and contact. The short-circuit grounding device is connected to the exposed conductor portion from which the insulation coating of the overhead distribution line has been removed over a predetermined length, but is removed after the work is completed. An insulated cover for the overhead distribution line is attached to the exposed conductor part of the overhead distribution line, and the insulation coating state of the exposed conductor part is restored.
FIG. 7 is a perspective view showing an external configuration of a conventional overhead cover for an electrical distribution line (hereinafter referred to as an insulation cover).
The insulating cover 200 is made of an insulating material, and is sandwiched between two insulation covering portions positioned at both ends of the conductor exposed portion when the conductor is closed while being covered with the conductor exposed portion of the overhead distribution line. The opening / closing members 202 and 210 and a hinge portion 220 that connects the respective end edges of the opening / closing members 202 and 210 so as to be freely opened and closed are configured.

The first opening / closing member 202 includes a main body 203 that accepts a conductor exposed portion inside a concave shape, two tongue-like coupling pieces 204 and 205 that protrude from the other end of the main body 203, and a tongue-like operation piece 206. And having.
The two coupling pieces are disposed at both longitudinal ends of the other end edge of the main body 203. Mounting holes 204a and 205a are formed through the coupling pieces 204 and 205, respectively. The operation piece 206 is disposed at an appropriate position between the two coupling pieces 204 and 205 and at a position biased toward the coupling piece 204 side.
The second opening / closing member 210 includes a main body 211 that accepts a conductor exposed portion inside a concave shape, two coupling pieces 214 and 215 that protrude from the other end edge of the main body 211, and an operation piece 216. The two coupling pieces 214 and 215 are disposed at both longitudinal ends of the other end edge of the main body 211. The operation piece 216 is disposed at an appropriate position between the coupling pieces 214 and 215 and at a position biased toward the coupling piece 215 side.
Locking protrusions 214a and 215a project from one surface of each coupling piece 214 and 215, and both opening and closing members 202 are centered on the hinge portion 220 in a state where the aerial distribution line is sandwiched between the recesses of the main bodies 203 and 211. , 210 is closed, the locking projections 214a, 215a are press-fitted into the mounting holes 204a, 205a of the coupling pieces 214, 215 to hold the both opening / closing members in an unopenable state.

Next, FIGS. 8A, 8B, and 8C show a procedure for attaching the insulating cover to the overhead wiring line by using an operation rod and an insulating jacket with a live wire tip tool attached thereto.
8A, 8B, and 8C show a procedure for temporarily locking the insulating cover 200 to the overhead power distribution line 250 with a cover presser 230 as a tip tool.
The cover presser 230 attached to the tip of the operation stick (hot stick) 225 has a hook portion 231 having a shape corresponding to the outer surface of the insulating cover 200 at the tip, and two operation pieces of the insulating cover below the hook 231. A clamping part 233 that clamps one of 206 and 216 is provided.
When the insulating cover 200 in which the two opening / closing members 202 and 210 are in an open state is placed on the exposed conductor portion of the high-voltage distribution line, in this example, the operating portion 216 is clamped by the clamping portion 233 so that the opening portion faces downward. In this state, the entire insulating cover 200 is temporarily raised above the high-voltage distribution line 250 as shown in FIG. With the open portion of the insulating cover 200 positioned above the exposed conductor portion of the high-voltage distribution line, the insulating cover is lowered to place the high-voltage distribution line (conductor exposed portion) on the inner surface of the insulating cover (between the open / close members 202 and 210). When the cover presser 230 is further lowered after the contact, the operation piece 216 is detached from the holding portion 233, and the state shown in FIGS. 8B and 8C is obtained. In the state of (b), the insulating cover 200 is pressed by the hook portion 231 of the cover presser 230 so as to be temporarily locked to the high voltage distribution line.

  Next, as shown in FIG. 8C, the crimping operation of the respective connecting pieces using the insulating Yatco 240 is performed. That is, in this example, one worker presses the insulating cover 200 against the high-voltage distribution line 250 by the cover presser 230, and the other worker uses the insulating jacket 240 to sandwich the left connecting pieces 204 and 214 and press-bond them. . Next, the cover retainer 230 is removed from the insulating cover, and the right coupling pieces 205 and 215 are crimped.

In this way, the above work is usually performed by two people.
At this time, when one of the pair of connecting pieces is pressure-bonded and then the other pair of connecting pieces is pressure-bonded, the tool is changed, and the work becomes complicated.
FIG. 9A shows a state in which the conductor portion 252 is exposed by partially peeling the insulation coating 251 of the insulation-coated electric wire 250, and FIG. 9B shows an insulation cover for distribution lines in a state in which the conductor portion is covered. The state which fixed 200 with respect to the insulation coating electric wire is shown.

  When the above work is carried out alone, as shown in FIG. 8 (b), the cover presser 230 is hooked on the insulating cover and suspended by its own weight. In this case, since the cover presser and the operation rod 225 are hung from the distribution line, there is a risk that the cover presser and the operation rod will fall if the wire is shaken by wind or the like. In addition, even in a single-person operation, when one of the coupling piece pairs is crimped and then the other coupling piece pair is crimped, the tool is changed, which makes the work complicated.

For this reason, as described above, the above operation is usually performed by two people.
In the insulation cover for overhead distribution lines according to Patent Document 1, the inner surfaces of a pair of gripping pieces that open and close in a Yatco shape of an indirect hot wire tool have a structure that holds the insulation cover in an open state. Holding the insulating cover on the inner surface of the gripping piece, covering the electric wire in this state, and closing the gripping piece completes the attachment to the electric wire.
In this conventional example, when the axial length of the insulating cover is long to some extent, it is necessary to hold the vicinity of both ends of the insulating cover with two indirect hot wire tools. In other words, it is not possible to attach an insulating cover with a single indirect hot wire tool and by one person.
In the electric wire insulation cover according to Patent Document 2, when attaching a member with different colors to the outer surface of the cover, an indirect hot wire tool band is hooked on one base of the Yatco, and the cover is arranged on the other base side. The indirect hot wire tool band is crimped to the outer surface of the cover by closing both caps in the state.

  However, when this indirect hot wire tool band is applied to an insulation cover, this band is simply a bent wire, and the insulation cover is securely connected to the wire after it is held by inserting one of the Yatco caps. It is difficult to attach to the outside. In particular, this band is provided on the opposite side of the open portion of the member for different colors, and even if such a band is attached to this part of the insulating cover, the tool is changed as it is after the insulating cover is put on the electric wire. It cannot be fixed easily by closing without closing. And it is invention regarding a member classified by hue, and is not used for attachment of insulation cover itself.

Japanese Patent Laid-Open No. 11-299066 JP 2011-193640 A

  The present invention has been made in view of the above, and makes it possible to attach an insulating cover to an aerial distribution line by an operation by a single worker using a single insulated yatco, and an installation operation for the aerial distribution line The present invention provides an aerial distribution line insulation cover and an adapter with improved performance.

In order to achieve the above object, an insulation cover for an aerial distribution wire according to the invention of claim 1 covers the exposed conductor portion by partially peeling off the insulation coating of the insulation coated wire. An insulation cover for an aerial distribution line that is fixed to each other, two open / close members that are openably / closably connected by an open / close support portion and that can maintain an open state when opened , and at least a pair of each open / close member Provided to each other when the opening and closing members are in a closed state, and are coupled to each other to maintain the opening and closing members in a closed state; and at least one of the connecting pieces on the one opening and closing member side , to the temporary fixing portion of the coupling piece accepted one said ferrule of the coupling tool having a openable pair of die to be attached nipped temporarily fixed by the elastic force, comprising the .
In addition, the adapter according to claim 2 is fixed to the insulation-coated electric wire in a state of covering the exposed conductor portion by partially peeling the insulation coating of the insulation-coated electric wire, and can be freely opened and closed by an opening / closing support portion. Two open / close members connected to each other, and at least one pair of each open / close member, and a coupling piece that maintains each open / close member in a closed state by being coupled to each other when each open / close member is in a closed state. An adapter that is attached to and detached from the coupling piece of the insulation cover for an aerial distribution line, and includes a base portion that is attached to one of the coupling pieces, and an engagement piece that curves and protrudes from the base portion. It is characterized by having.

  According to the present invention, it is possible to attach an insulating cover to an overhead distribution line by work by a single worker using a single insulating yacht (operating rod).

It is an external appearance perspective view of the insulation cover for overhead distribution lines which concerns on one Embodiment of this invention. (A) (b) And (c) is the front view, left view, and bottom view which show the structure of this insulation cover for overhead distribution lines. (A), (b) and (c) are the front view, the left view, and the bottom view which show the structure of the conventional insulation cover for overhead power distribution lines. (A) (b) And (c) is a figure which shows the procedure which attaches an insulation cover with respect to an insulation jacket, and the procedure which attaches the insulation cover hold | maintained with the insulation jacket to an aerial distribution line. (A) (b) And (c) is the external appearance perspective view, front view, and left view which show the structure of the adapter of the type retrofitted with respect to the insulation cover for overhead distribution lines. (A) (b) And (c) is a figure explaining the procedure which attaches an insulating cover with respect to an aerial distribution line using an adapter using an insulating Yatco. It is a perspective view which shows the external appearance structure of the conventional insulation cover for overhead distribution lines. (A) (b) And (c) is the figure which showed the procedure which attaches an insulation cover to an aerial wiring line using the operation stick | rod with which the tip tool for live wires was attached, and an insulation jacket. (A) is the figure which showed the state which exposed the conductor part of the insulation coating electric wire, (b) is the figure which showed the state which fixed the insulation cover for distribution lines with respect to the insulation coating electric wire.

<First Embodiment>
Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
FIG. 1 is an external perspective view of an aerial distribution line insulation cover according to an embodiment of the present invention, and FIGS. 2A, 2B, and 2C are front views showing the configuration of the aerial distribution line insulation cover. They are a left view and a bottom view. 3A, 3B, and 3C are a front view, a left side view, and a bottom view showing a configuration of a conventional insulation cover for an aerial distribution line. FIGS. 4A, 4B, and 4C are diagrams showing a procedure for attaching the insulating cover to the insulating jacket and a procedure for attaching the insulating cover held by the insulating jacket to the overhead distribution line.

The insulation cover for overhead distribution wires (hereinafter referred to as insulation cover) 1 covers the conductor portion 252 exposed by partially peeling the insulation coating 251 of the insulation coating electric wire 250 shown in FIG. It is fixed to the covered electric wire. The insulating cover 1 is made of an insulating resin material.
The insulating cover 1 is provided with two substantially semi-cylindrical opening / closing members 10 and 20 connected to each other by a hinge portion (opening / closing support portion) 35, and at least a pair of the opening / closing members 10 and 20, respectively. When the members are in the closed state, they are connected to each other so as to maintain the open / close members in the closed state, and at least one connecting piece (in this example, outside of the connecting piece 21). And a temporary fixing portion 40 that receives and temporarily fixes a part of a coupling tool (insulating Ytco) that clamps and couples two coupling pieces.

The hinge part (opening / closing support part) 35 is located at a connecting part between the two opening / closing members 10 and 20, and connects both opening / closing members so as to be opened and closed by a technique such as processing the connecting part into a thin wall.
Each of the open / close members 10 and 20 has a semi-cylindrical shape in which the cylindrical body is vertically divided, and the overhead distribution line 250 (FIG. 9) is received along the inner surface of the recess of each open / close member. Insulation located on both sides of the conductor portion in a state where the conductor portion 252 of the overhead distribution wire is covered by crimping the connecting piece 11 and the connecting piece 21, and the connecting piece 13 and the connecting piece 23, respectively. It will be in the state fixed with respect to the coating | cover 251. FIG. The opening / closing members 10 and 20 are provided with large-diameter main bodies 10A and 20A and small-diameter protruding pieces 10B and 20B protruding in the axial direction from the main bodies 10A and 20A, with the overhead distribution wires sandwiched therebetween. When the opening and closing members 10 and 20 are closed, the projecting pieces 10B and 20B are in a fixed state by sandwiching the insulation coating 251 of the overhead distribution line.
Each coupling piece 11, 13, 21, 23 protrudes from the open end edge (the side opposite to the hinge portion 35) of each opening / closing member 10, 20 in the outer diameter direction. The coupling pieces 11 and 21 and the coupling pieces 21 and 23 are arranged in the same positional relationship so as to be coupled to each other. Each coupling piece protrudes at both ends in the longitudinal direction of the open end edge of each opening / closing member.

The coupling pieces 11 and 13 provided on the first opening / closing member 10 side are formed with locking holes (long holes) 11a and 13a, respectively, and the inner side surfaces of the coupling pieces 21 and 23 on the second opening / closing member 20 side. Are provided with hooked locking projections 21a and 23a which are press-fitted into the locking holes 11a and 13a. When the second opening / closing member 20 is closed with respect to the first opening / closing member 10 and the coupling piece 11 and the coupling piece 21 and the coupling piece 13 and the coupling piece 23 are respectively crimped by an insulating jacket, the respective locking projections 21a and 23a are It press-fits into each locking hole 11a, 13a, and the jaw part of each locking projection prevents falling off.
In addition, tongue-like operation pieces 15 and 25 project from the open side edge of each opening and closing member in a state in which the positional relationship is shifted. The operation piece 15 is located between the coupling pieces 11 and 13 projecting from both ends in the longitudinal direction of the open side edge of the first opening / closing member 10, and the operation piece 25 is opened to the second opening / closing member 20. It is located between the coupling pieces 21, 23 on the side edge.

  Although the shape of the details of the insulating cover may vary depending on the product, the structure in which the temporary fixing portion 40 is added to one coupling piece is the most characteristic in this embodiment. For example, in the above configuration example, the coupling pieces 11 and 13 having the locking holes 11a and 13a are arranged on the first opening / closing member 10 side, and the coupling pieces having the locking projections 21a and 23a on the second opening / closing member 20 side. 21 and 23 are arranged, but a coupling piece provided with a locking hole on the first opening / closing member 10 side and a coupling piece provided with a locking projection are arranged one by one, and a locking projection is provided on the second opening / closing member 20 side. You may arrange | position the coupling piece provided with the connected coupling piece and the locking hole one by one.

In the present embodiment, the temporary fixing portion 40 is manufactured in a lump when the insulating cover is manufactured by injection molding. However, as will be described later, the temporary fixing portion (adapter) can be retrofitted to a coupling piece of the ready-made insulating cover. It is good also as a structure.
The temporary fixing part 40 is used to hold the insulating cover between the two bases by inserting one base of the insulating jacket 80 shown in FIG. 4A into the temporary fixing part. In other words, the temporary fixing portion 40 is a means for forming a space S in which the tip of one base of the insulating jacket can be inserted and held. Accordingly, the shape of the temporary fixing portion is not limited to the illustrated one.
In the above-described embodiment, the temporary fixing portion 40 is provided on the coupling piece 21 having the locking projection. However, the temporary fixing portion may be provided on the outer surface of the coupling piece having the locking hole. Moreover, you may provide a temporary fixing | fixed part in a some coupling | bond piece.

As shown in FIG. 4 (a), an insulating jacket (joining tool) 80 has a main operating rod 81, a fixed base 83 fixed to the tip of the main operating rod, and a shaft that can be freely opened and closed by the tip of the main operating rod. The movable side base 85 is supported, the movable side base 85 is pivotally supported at the tip, the base end portion is pivotally supported by a shaft portion 81a provided on the main operation rod 81, and the shaft portion 81a is used to rotate the shaft. And a lever 88 that opens and closes the movable base 85 by moving the auxiliary operation rod 87 in the axial direction when it is pivotally supported and rotated. Since other detailed configurations are well known, description thereof will be omitted.
The outer surface of the distal end portion of the fixed side base 83 is usually formed with a recess 83a that is used when supporting another tool (for example, a bird snake adapter (not shown), etc.). On the inner wall of 40, a protrusion 42 is provided so as to be fitted into the recess 83a and temporarily locked. The width of the fixed side cap is significantly shorter than the total length of the insulating cover, but by inserting the tip of the fixed side cap into the space S of the temporary fixing portion 40, the elastic force of the temporary fixing portion is used. The insulating cover can be held with sufficient strength, and the posture of the insulating cover with respect to the fixed side cap can be held in a predetermined (for example, an orthogonal posture).
In this embodiment, an example is described in which the temporary fixing portion 40 is temporarily fixed to the distal end portion of the fixed side base 83 of the insulating jacket. However, the temporary fixing portion may be temporarily fixed to the movable side base 85.

A procedure for fixing the insulating cover 1 having the above configuration to the overhead distribution line using the insulating Yatco 80 will be described with reference to FIG.
In FIG. 4A, the lever 88 is operated to open the movable side cap 85 to a sufficient opening amount, and the fixed side cap is placed in the space S of the temporary fixing portion 40 of the insulating cover with the open portion facing upward. Insert the tip of 83. The size and shape of the void S are configured in advance to be suitable for elastically holding the tip of the base, and the tip of the base can be temporarily fixed to the temporary fixing portion so as not to easily fall off. Further, since the outer peripheral surfaces of the opening and closing members 10 and 20 are supported by the inner surfaces of the two caps as shown in (b), the entire insulating cover can be stably held by the tip portion of the fixed base 83. In particular, since the protrusions 42 provided on the inner wall of the temporary fixing portion 40 are fitted into the recesses 83a provided on the fixed base, the stability of holding the insulating cover can be further enhanced.

As shown in FIG. 4B, the tip of one base is press-fitted into the space of the temporary fixing part to hold the insulating cover with a sufficient holding force, while the insulating cover is provided on the inner side surfaces of both bases 83 and 85. With the outer surface of the insulation cover held, an operator on a work vehicle or the like makes the insulation cover held at the tip of the insulation jacket from the lower side approach the conductor portion from which the insulation coating of the overhead distribution line 250 is removed. The overhead distribution line 250 is inserted inside the two opening and closing members.
When the movable side base 85 is closed by operating the lever 88 in a state where the overhead distribution line 250 is inserted inside the two opening / closing members of the insulating cover, the coupling piece 11 is formed on the inner surface of the distal end portion of the movable side base 85. In order to press the outer side surface, both the coupling pieces 11 and 21 are sandwiched between the fixed side base 83 and the inner surface of the distal end portion, so that the locking projection 21a can be press-fitted into the locking hole 11a to be in a coupled state. (FIG. 4 (c)).
Since the insulating cover 1 covers the conductor portion of the overhead distribution line 250 and is locked to the insulating coating portion located on one side of the conductor portion when the both coupling pieces 11 and 21 are in the coupled state. Even if the base of the insulating jacket is opened and separated from both the coupling pieces 11 and 21, the insulating cover does not fall off from the overhead distribution line or be displaced.

On the other hand, since the other coupling pieces 13 and 23 are in a state in which the inner surfaces are close to each other in the stage of FIG. 4C, the two insulating pieces 13 and 23 are moved by both caps by moving the same insulating jacket. When pinched, the locking projection 23a is press-fitted into the locking hole 13a, and the coupling between the coupling pieces is completed.
As described above, the insulating cover 1 according to the present embodiment includes the temporary fixing portion 40 provided on at least one coupling piece. The temporary fixing portion is used to insulate the tip of one base of the insulating jacket. A cover can be attached. At this time, since the protrusion 42 fits into the recess 83a of the fixed side base, the temporary fixing strength of the fixed side base with respect to the temporary fixed part 40 can be increased, and even if a slight shock is applied, the temporary fixed part Will not fall out of the fixed base or be misaligned.

In this way, by attaching the insulating cover in the open state to the one base of the insulating Yatco using the temporary fixing portion 40, the insulating cover is disposed on the inner surfaces of the two bases 83 and 85 in the open state. be able to. In this state, when the worker uses the insulating yoke to bring the insulating cover (the open portion) closer from below the overhead distribution line, the overhead distribution line can be positioned within the open portion of the insulation cover. Then, the lever 88 is operated as it is and the movable side base 85 is closed without changing the insulating jacket, so that the opening / closing members 10 and 20 are rotated in the closing direction around the hinge portion 35 via the two coupling pieces 11 and 21. Can be moved. Further, by increasing the clamping force on the two coupling pieces 11 and 21 by lever operation, the coupling protrusions 21a can be pressed into the coupling holes 11a to couple the coupling pieces. At this time, the overhead distribution line 250 is in a state of sandwiching both opening and closing members.
In this state, the two opening and closing members 10 and 20 are almost closed by the two connecting pieces 11 and 21, and there is no possibility that the insulating cover is displaced from the overhead distribution line or falls off. In addition, since the other coupling pieces 13 and 23 are also sufficiently close to each other, the fixing side cap 83 of the insulating jacket can be removed from the temporary fixing portion, and the same insulating jacket (without changing) can be removed. It can be combined by moving to 13 and 23 and pressurizing between two caps.

After the insulating cover is fixed to the required part of the overhead distribution line, the two caps may be opened to release the insulating jacket.
In order to make it easier to apply a stronger pressure to the outer surfaces of the coupling pieces 11 and 13 by the distal end portion of the movable side base 85 when the respective coupling pieces are joined by the insulating jacket, the contact portion with the movable side base A bulging portion indicated by reference numeral 18 in FIG.
When the insulating cover 1 in the coupled state is removed from the overhead distribution line 250, the two operation pieces 15 and 25 are used. The insulating cover fixed to the overhead distribution line is in a state in which the open portions of the two opening and closing members 10 and 20 (positions of the operation piece and the coupling piece) face upward, but when the insulation cover is removed, the operation piece 15, 25, it is necessary to pry open the two opening and closing members (two coupled pieces in the coupled state), so that the insulating cover is rotated 180 degrees by picking appropriate projections such as the operation pieces 15 and 25 with an insulating jacket. It is necessary to reverse the top and bottom. That is, the operation pieces 15 and 25 are rotated so as to face downward. In this state, the two operation pieces 15 and 25 whose axial positions are shifted are sandwiched between the insulating yokes, and a force is applied in a direction to open the opening / closing member, thereby separating and opening the respective coupling pieces in the coupled state. The member can be opened and the insulating cover can be removed from the overhead distribution line.

<Second Embodiment>
Next, FIGS. 5A, 5 </ b> B, and 5 </ b> C are an external perspective view, a front view, and a left side view showing the configuration of an adapter of a type that is retrofitted to an existing overhead cover for electric power distribution lines. FIGS. 6A, 6B, and 6C are views for explaining a procedure for attaching an insulating cover to an aerial distribution line by using an adapter using an insulating jacket.
The adapter 100 is made of an insulating material such as a synthetic resin, and includes a base 101 attached to one of the coupling pieces of the insulating cover 1, in this example, the coupling piece 21, and a J-shape from the base 101. Or it is roughly comprised from the engagement piece 120 which curves and protrudes in a U shape.
The base 101 is a base of an insulating Yatchco, in this example, a substantially box-shaped temporary fixing portion 103 having a recess (opening) 104 into which the front end portion of the fixed side base 83 is inserted, and an upper portion of the front end edge of the temporary fixing portion. The locking claw 105 formed downward and protruding downward, and the overhanging piece 108 in which the left and right vertical edges of the temporary fixing portion 103 protrude forward are roughly provided. The upper end portion of the elastic engagement piece 120 is integrated with the lower end portion of the front wall 110 of the temporary fixing portion located between the two overhanging pieces 108.

On the front surface of the rear wall 112 of the temporary fixing portion 103, a protrusion 112a is provided so as to fit into a recess 83a provided in the fixing side base 83 of the insulating jacket and temporarily lock. In addition, a protrusion 110a is provided on the front surface of the front wall 110 of the temporary fixing portion so as to fit into a recess formed on the back surface of the coupling piece 21 of the insulating cover.
The internal shape and size of the recess 104 of the temporary fixing portion 103 are configured such that when the distal end portion of the fixing side base 83 of the insulating jacket is press-fitted, it can be pinched and held so that it does not fall off due to sufficient elasticity. The locking claw 105 has an insulating cover in the recess formed by the two overhanging pieces 108 as shown in FIG. 6A in a state where the fixing side base 83 is inserted and held in the recess 104 of the temporary fixing portion. When the connecting piece 21 is attached, the base 101 is locked to the connecting piece 21 with sufficient strength by the hooking claw being hooked on the upper edge of the connecting piece 21.

When the coupling piece 21 and the coupling piece 11 are coupled as shown in FIG. 6B, a wedge-shaped gap is formed between the upper end portions of the coupling piece 21 and the coupling claw 105 and the coupling piece 21 using this gap. And the locked state can be maintained. The distance between the two protruding pieces 108, the protruding length and the shape of each protruding piece are set to such a level that the both side edges of the connecting piece can be held with sufficient clamping force when the connecting piece 21 is inserted therebetween.
The elastic engagement piece 120 is a plate-like body that can be elastically deformed, and is curved in an arc as shown in FIGS. 5A and 5C when no external force is applied. When the coupling piece 21 is held by the front wall 110, the locking claw 105, and the two protruding pieces 108 of the temporary fixing portion, the elastic engagement piece 120 is hinged from the outer peripheral surface of the one opening / closing member 20 (opening / closing support portion). It is configured so as to be pressed against the outer surface of 35. As a result, the insulating cover (opening / closing member 20) in the open state can be reliably locked and held with respect to the adapter 100 temporarily fixed by the fixed side cap 83 in cooperation with the base 101. Become.
In this state, by closing the movable side base 85 of the insulating Yatco, both the opening and closing members 10 and 20 are closed with the overhead distribution line 250 sandwiched therebetween as shown in FIG. 13, the coupling pieces 21 and 23 can be in a coupled state.

  After closing both the caps of the insulating jacket and fixing each connecting piece in a state where both the opening and closing members are closed with respect to the overhead power distribution line, the both caps of the insulating jacket are opened as shown in FIG. 6 (c). Furthermore, the adapter 100 which is mainly locked to the outer surface of the opening / closing member 20 may be detached from the insulating cover together with the fixed base 83. Since the adapter 100 is merely locked to the coupling piece 21 by the locking force of the locking piece 105, it can be easily detached from the coupling piece. That is, the locking claw 105 is hooked on the coupling piece 21 by the elastic force of the elastic engagement piece 120. Therefore, in order to detach the adapter 100 from the coupling piece 21, it is only necessary to push the locking claw 105 away from the coupling piece 21 with the distal end of the insulating jacket utilizing the elastic force of the elastic engagement piece 120. At this time, the latching claw 105 is configured to have elasticity, or the tip of the latching claw 105 is sharpened to facilitate detachment.

Further, the fixed side cap 83 can be easily detached from the recess 104 of the temporary fixing portion 103.
As described above, the adapter 100 is attached to and detached from one of the coupling pieces of the insulating cover for the distribution line, and is bent from the base portion 101 to be attached (retrofitted) to the single coupling piece. And a protruding elastic engagement piece 120. The base 101 is temporarily fixed to one base (for example, the fixed side base 83) of the insulating jacket, and the elastically deformable elastic engagement piece 120 is a part of the insulating cover, in this example, one of the opening / closing members 20. By contacting the outer surface, the adapter can be locked to the insulating cover.
In this way, by attaching an insulating cover in an open state using an adapter to one base of the insulating Yatco, this insulating cover can be disposed on the inner surfaces of the two bases 83 and 85 in an open state. . In this state, when the worker uses the insulating yoke to bring the insulating cover (the open portion) closer from below the overhead distribution line, the overhead distribution line can be positioned within the open portion of the insulation cover. Then, without changing the insulating jacket, the lever is operated as it is to close the movable base, thereby turning the opening and closing members 10 and 20 around the hinge portion 35 in the closing direction via the two coupling pieces 11 and 21. be able to. Further, by increasing the clamping force on the two coupling pieces 11 and 21 by lever operation, the coupling protrusions 21a can be pressed into the coupling holes 11a to couple the coupling pieces. At this time, the overhead distribution line 250 is in a state of sandwiching both opening and closing members.

In this state, the two opening and closing members 10 and 20 are almost closed by the two connecting pieces 11 and 21, and there is no possibility that the insulating cover is displaced from the overhead distribution line or falls off. In addition, since the other coupling pieces 13 and 23 are also sufficiently close to each other, the fixing side base 83 of the insulating jacket can be removed from the recess 104 of the temporary fixing portion 103, and the same insulating jacket is connected to the other coupling piece. It can be combined by moving to 13 and 23 and pressurizing between two caps.
After the insulating cover is fixed to the overhead distribution line in this way, the insulating jacket and the adapter may be detached from the insulating cover.
The removed adapter can be reused when another insulating cover is attached to the overhead distribution line.
According to this adapter, since it can be attached to and detached from the existing (old) insulating cover, there is no need to newly manufacture the insulating cover.

Alternatively, the adapter may be integrated by being fixed to an existing insulating cover coupling piece with an adhesive or the like. In this case, since the adapter is fixed to the coupling piece, it cannot be reused as compared with the case where it can be attached / detached, but since the fixing to the coupling piece is ensured, there is no possibility that the cap of the insulating jacket is detached during the work. .
Further, if the adapter, the coupling piece, and the contact surface are detachably temporarily fixed with a double-sided tape or the like whose adhesive force is adjusted, the adapter is not only fixed more reliably, but also can be removed and reused.

<Summary of Configuration, Action, and Effect of the Present Invention>
The insulation cover 1 for distribution lines according to the present invention is fixed to the insulation-coated electric wire in a state of covering the exposed conductor portion 252 by partially peeling the insulation coating 251 of the insulation-coated electric wire 250, and (Opening / closing support part) Two opening / closing members 10 and 20 connected to each other by an opening / closing member 35 and at least a pair of each opening / closing member are provided, and each opening / closing member is coupled to each other when the opening / closing members are in a closed state. Accepting and temporarily fixing a part (base) of the connecting tool 11, 13, 21, 23 for maintaining the member in a closed state, and a connecting tool provided on at least one of the connecting pieces to clamp and join the connecting pieces The temporary fixing part 40 to be provided is provided.
The structure of the temporary fixing portion 40 is not limited to the illustrated one, and any structure may be used as long as it can be temporarily locked to one of the caps of the insulating jacket. Here, the temporary locking means a locking force with such a strength that the insulating cover can be kept in a sufficiently balanced state when the insulating jacket is inserted into the temporary fixing portion. . Therefore, when the worker lifts the insulation jacket toward the required location of the overhead distribution line, the insulation cover temporarily locked to the base maintains the posture that is orthogonal (crossed) to the operation rod, The required part of an aerial distribution line can be received in the open part.
In the state in which the base of the insulating Yatch in the open state is temporarily locked to the temporary fixing portion 40, the insulating cover is located on the inner surfaces of the two bases in the open state. For this reason, if the insulating yoke is operated and the two bases are closed with the required portions of the overhead distribution wires received inside the two opening and closing members 10 and 20, the tips of the two bases face each other (contact). The two connecting pieces (11 and 21, 13 and 23) are bonded to each other.

By coupling a pair of coupling pieces, the two opening / closing members 10 and 20 are temporarily locked to the required locations of the overhead distribution lines, and the other pair of coupling pieces are also in close proximity. . For this reason, even if the insulating jacket is separated from the first coupled piece pair, the insulating cover is not displaced or detached from the overhead distribution line, and the other pair of coupling pieces is coupled using the same insulated jacket. Thus, the attachment of the insulating cover can be completed.
This work can be sufficiently performed by one worker.

Next, the adapter 100 according to the present invention is fixed to the insulation-coated electric wire in a state of covering the exposed conductor portion by partially peeling the insulation coating of the insulation-coated electric wire, and the hinge portion (opening / closing support portion) ) And two open / close members connected to each other in a freely openable / closable manner, and each open / close member coupled to maintain the open / close members in a closed state by being coupled to each other when the open / close members are in a closed state. A base 101 attached to one connecting piece, and an engaging piece that curves and protrudes from the base 120.
This adapter can be retrofitted to one of its coupling pieces without any modification to the existing insulating cover. By temporarily fixing one base of the insulating Yatco to the adapter, the base and the coupling piece of the insulating cover can be temporarily fixed via the adapter.
The procedure for fixing the insulating cover to the overhead distribution line is the same as that for the distribution line insulating cover 1.

Since this adapter can be applied to an existing insulating cover, it is not necessary to newly manufacture an insulating cover, which is advantageous in terms of cost.
This adapter can be detachable, or it can be attached to the coupling piece with double-sided tape with moderately adjusted adhesive strength, increasing the attachment strength to the coupling piece, and after attaching the insulating cover to the overhead distribution line It can be reused by removing.
Moreover, you may make it implement | achieve a structure substantially equivalent to the insulating cover 1 for distribution lines by fixing an adapter to the coupling | bond piece of the existing insulating cover by adhesion | attachment etc.

DESCRIPTION OF SYMBOLS 1 ... Insulation cover for distribution lines (insulation cover), 10, 20 ... Opening / closing member, 11, 13, 21, 23 ... Joining piece, 11a ... Locking hole, 13a ... Locking hole, 21a, 23a ... Locking protrusion, DESCRIPTION OF SYMBOLS 15, 25 ... Operation piece, 35 ... Hinge part (opening-closing support part), 40 ... Temporary fixing part, 42 ... Protrusion, 80 ... Insulating Yatco, 81 ... Main operation rod, 81a ... Shaft part, 83 ... Fixed side nozzle | cap | die, 83a ... recess, 85 ... movable side base, 87 ... sub-operating rod, 88 ... lever, 100 ... adapter, 101 ... base, 103 ... temporary fixing part, 104 ... recess, 105 ... locking claw, 108 ... overhanging piece, DESCRIPTION OF SYMBOLS 110 ... Front wall, 110a ... Protrusion, 112 ... Rear wall, 112a ... Protrusion, 120 ... Elastic engagement piece, 250 ... Overhead distribution line (insulation-coated electric wire), 251 ... Insulation coating, 252 ... Conductor part, space ... S.

Claims (2)

An insulation cover for an aerial distribution line fixed to the insulation-coated electric wire in a state of covering the exposed conductor portion by partially peeling the insulation coating of the insulation-coated electric wire,
At least a pair of two opening / closing members that are openably / closably connected by the opening / closing support portion and that can be kept open when opened , and each opening / closing member are coupled to each other when the opening / closing members are in the closed state. A coupling piece for maintaining each of the opening and closing members in a closed state,
One of the coupling tools having a pair of openable and closable caps provided on at least one of the coupling pieces on the side of the one of the opening and closing members to squeeze and couple the coupling pieces is received by elastic force. An insulation cover for an aerial distribution line, comprising: a temporary fixing portion that is temporarily fixed. Two opening and closing members fixed to the insulating covered electric wire in a state of covering the exposed conductor portion by partially peeling the insulating covering of the insulating covered electric wire, and openably and closably connected by an opening and closing support portion; The coupling of the insulation cover for an overhead distribution line having at least one pair each of the opening and closing members and a coupling piece for maintaining the opening and closing members in the closed state by coupling to each other when the opening and closing members are in the closed state An adapter to be attached to and detached from the piece,
An adapter comprising: a base portion attached to one of the coupling pieces; and an engagement piece that curves and protrudes from the base portion.

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